Portion of an article of footwear



FIG. 1 is a front perspective view from the lateral side of a portion of an article of footwear showing our design.

FIG. 2 is an elevational view thereof.

FIG. 3 is an elevational view of the medial side view thereof.

FIG. 4 is a front elevational view thereof.

FIG. 5 is a rear elevational view thereof.

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines appearing in FIGS. 1-7 are for environmental purposes only and form no part of the claimed design. 

The ornamental design for a portion of an article of footwear, as shown and described. 